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.Management Sciences
Category: Fertilizer Technology
Superphosphate is manufactured by reacting phosphate rock with_____________________?
A. Acetic acid
B. Sulphuric acid
C. Aluminium chloride
D. None of these
Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at ____________ °C in absence of air?
A. 50-80
B. 250-400
C. 1000-1200
D. 800-900
Nitrogen content of a nitrogenous fertiliser is 35%. It could be___________________?
A. Urea
B. Ammonium nitrate
C. Calcium ammonium nitrate (CAN)
D. Ammonium sulphate
Montecatini process is used for the manufacture of____________________?
A. Nitric acid
B. Phosphoric acid
C. Urea
D. Calcium ammonium nitrate (CAN)
In calcium ammonium nitrate (CAN) fertiliser ____________________?
A. Nitrate nitrogen is quick acting
B. Ammoniacal nitrogen is quick acting
C. Nitrate nitrogen is slower acting
D. None of these
Heating of ortho-phosphoric acid to about 900°C, produces_________________?
A. Meta-phosphoric acid
B. Pyrophosphoric acid
C. No change in it
D. None of these
Dehydration of ammonium carbamate (to produce urea) is a/an _____________ reaction?
A. Reversible
B. Catalytic
C. Exothermic
D. Endothermic
Raw materials required for the production of CAN (Calcium ammonium nitrate) is NH3__________________?
A. HNO3 & limestone
B. CO2 & H2SO4
C. HNO3 & NH4Cl
D. CO2 & KNO3
Pick out the wrong statement ?
A. Nitrogen is normally supplied in fertiliser either in Ammoniacal or the nitrate form, from
which the soil takes it up in the form of ammonium ions or nitrate ions and forms amino acids
B. Calcium present in the fertiliser helps in correcting the soil acidity
C. Particle size range of a good granular fertiliser is 10-15 mesh and it contains less moisture as
compared to finely divided powder form of fertiliser
D. Ammonium nitrate fertiliser is obtained as a by-product in an integrated steel plant having byproduct
coke ovens
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